planetary wave


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planetary wave

[′plan·ə‚ter·ē ′wāv]
(communications)
(meteorology)
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Thus, the variance of the GPH20 represented by the wavenumber-1 modes is 10% greater for warm than for cold winters, which is in agreement with previous findings that associate enhanced planetary wave activity in the stratosphere with warm-El Nino conditions (i.
And similar occurrences of planetary wave resonance have been connected by other researchers to extreme events around the world, including heat waves in Europe in 2003, Russia in 2010, and the United States in 2011.
During several recent extreme weather events, these planetary waves almost freeze in their tracks for weeks," said Vladimir Petoukhov, the study's lead author.
Scientists at the University of Victoria in British Columbia recently built a computer model to look at how these so-called planetary waves will respond to more heat.
Stratospheric final warming events are caused by large-scale Rossby waves, planetary waves that are produced when winds in the troposphere blow over different surfaces on the Earth, such as major mountain ranges.
These so-called planetary waves warm the polar stratosphere and slow ozone destruction.
The original Hovmoller diagram, using 500-hPa geopotential heights, was intended to highlight not only the positions of the planetary waves but also incidents of downstream development, a successive development and/or amplifications of troughs and ridges (Fig.
Sudden stratospheric warmings (SSWs) are impressive temperature rises in the winter polar stratosphere driven by the breaking of planetary waves propagating up from the troposphere.